Bracelet Forming Pliers 16 mm vs 20 mm: Which Curve to Choose
By Jewellery Tools UK — Hand Tools for Jewellers & Silversmiths | Published: 2026-11-03
Category: Comparisons
A double cylinder bracelet forming tool puts 16 mm and 20 mm curves on one pair of pliers. Here is how to choose the diameter that suits your bangle, cuff or wire work.
Quick answer
Choose the 16 mm cylinder when you need tight, repeatable bangle and small bracelet curves; choose the 20 mm when you want a broader, softer cuff or bracelet arc. Because the Bracelet Forming Pliers carry both diameters on one small stainless-steel tool, most makers get the tighter curve they use most and the broader curve as a bonus.
Why the diameter changes more than the look
A 16 mm cylinder pulls wire or flat strip into a noticeably tighter arc than a 20 mm cylinder. That difference matters most at the ends of a bracelet, where a tight curve has to stay even rather than kink. The 20 mm cylinder spreads the same bend over a longer arc, so a cuff or wide bracelet feels less sharply curved on the wrist.
The choice is not about one being better. It is about which curve you repeat most often and whether you can afford a second tool for the other diameter.
The trade-off: tight control versus broader comfort
Tighter curves are harder to keep even freehand, which is why the 16 mm cylinder earns its place on a forming tool. The cost is that a 16 mm arc can feel severe on a wide cuff or a heavy-gauge bracelet, and it leaves less room for adjustment if the fit is slightly off.
The 20 mm cylinder gives a gentler, more forgiving arc that suits broader bracelets and cuffs, but it will not produce the close bangle curve that some designs depend on. If your work mixes both, a single-diameter tool forces a compromise; a double cylinder pair avoids it.
When one pair of double cylinder pliers is enough
If you make bracelets, bangles and cuffs in small batches and want repeatable bends without switching tools, two close working diameters on one pair cover the common range. The polished stainless-steel jaws are supplied as non-marking in the catalog, so you spend less time cleaning up bend marks before finishing.
The limitation is honest: this is a small pair with 16 mm and 20 mm cylinders. If your designs call for much larger bangle diameters or very heavy strip, check that the jaw length and tool size suit your metal before relying on it as your only forming tool.
Decision rules for 16 mm versus 20 mm
- Tight bangle and small bracelet curves: Use the 16 mm cylinder when the design needs a close, repeatable arc and the metal is light enough to bend cleanly around a small diameter. Test the first bend on scrap of the same gauge before committing the piece.
- Broad bracelet and cuff arcs: Use the 20 mm cylinder when you want a gentler curve across a wider band or cuff, or when a 16 mm arc would feel too severe on the wrist. Check the fit on a mock-up before forming the final piece.
- Mixed production: Keep one double cylinder pair at the bench rather than buying two single-diameter tools; the 16 mm and 20 mm cylinders sit on the same small tool. Confirm the small tool size is comfortable for your hand during repeated bends.
Product facts
- Bracelet Forming Pliers — Double Cylinder, Small, 16 mm & 20 mm, Stainless Steel: Small double cylinder pliers with 16 mm and 20 mm stainless-steel cylinders for wire and flat strip. Two close diameters on one tool let you move between a tight bangle curve and a broader bracelet arc without changing pliers.
Bracelet Forming Pliers — Double Cylinder, Small, 16 mm & 20 mm, Stainless Steel - Bracelet Forming Pliers — Double Cylinder, Small, 16 mm & 20 mm, Stainless Steel: Polished stainless-steel jaws are described as non-marking as the metal takes shape. Less marking means less filing and polishing after forming, which matters most on visible bracelet and cuff surfaces.
Who should choose which
Best for
- Makers who form bangles, bracelets and cuffs in wire or flat strip and want repeatable 16 mm and 20 mm curves from one small tool
- Jewellers who want non-marking stainless-steel jaws to reduce clean-up after bending
Not for
- Makers who need much larger bangle diameters or very heavy strip, where a dedicated mandrel or larger forming tool is the better choice
- Anyone who only ever needs a single curve diameter and prefers a simpler single-purpose tool
